It is possible to re-varnish a previously varnished floor which is good condition, however, if the previous varnish has started to wear in some areas, its flaking or cracking, the only good option is to peel the original varnish and start again.
Before one can start coating the floor, it is a requirement that all other previous finishes be removed so that the timber is free of dirt, polish, wax, and grease. Once the removal of the old finish is done, the timber is now sanded and if necessary stained.
Apply the First Coat of Varnish
When the first coat of the varnish is applied, it is thinned using the suitable thinner, typically one of between 25 to 50% . This first coat acts as a sealer on the timber, providing a bond between the timber and the subsequent layers of varnish. Thinned varnish is typically water-like making it easy to work with but also easy to splash about.
Use a 10 cm brush to apply the thinned varnish along the length of the floorboards and not across the grain. It is important that you first work on a couple of the floorboards before you can move to working on the next ones. When applying the varnish try as much as you can not spread the varnish on the neighboring floorboards as any overlapping will be clearly visible in the final job. Know more about Strip and Wax Tile Flooring Baltimore.
Applying the Remaining Coats
For these coats use the 10cm brush to apply the varnish first across the grain and then brush it along the grain. When the varnish starts to set in, avoid using the brush to go back over it so as to avoid leaving the brush marks. First complete the length of a few boards before moving on to the next ones. Again avoid spreading varnish to the neighboring boards as overlapping will be seen in the completed job.
Give Time for the Varnish to Cure
Give the varnish sufficient time to dry and don’t rush to move into the room. Mostly, the recommended time runs between 72 hours and above but this is quite different from the dry overcoat time as this means that the coat is cured enough to take the next coat but is still soft . The longer one can wait before using the varnished room the better.
Re-varnishing the Floorboards
A floor that is in reasonable condition, re-varnishing can be done without fully stripping the original coat of finish. The final appearance of the floor may not look appealing as to when the floor was stripped of the original coat, sanded and re-varnished as any damage that was on the original floor may still be clearly visible. Check out Scrub and Recoat Floors Baltimore for more details.